Sheffield Gauge Plate Ltd. - Sheffields Leading Supplier of Precision Ground Tool Steels
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Subject to material availability Sheffield Gauge Plate Limited are able to offer "Special" dimensions and lengths based on the following parameters:
|Precision Finish - Imperial range sizes and tolerances|
|Maximum Width:||16" (supplied with sawn edges)||+0.005" / -nil|
|Precision Finish - Metric range sizes and tolerances|
|Maximum Width:||406mm (supplied with sawn edges)||+0.2mm / -nil|
|Maximum Thickness:||50mm||+0.05mm / -nil|
|Rotary Ground Finish - Imperial range sizes and tolerances|
|Maximum Width:||18" (supplied with sawn edges)||+0.015" / +0.025"|
|Maximum Thickness:||2"||+0.015" / +0.025"|
|Rotary Ground Finish - Metric range sizes and tolerances|
|Maximum Width:||457mm (supplied with sawn edges)||+0.4mm / +0.8mm|
|Maximum Thickness:||50mm||+0.4mm / +0.8mm|
Alternative Tolerances are available on [request]Any lengths shorter than the standard 18" or 500mm can be discussed at the time of enquiry, maximum length - 144" / 3657mm dependent on material availability. WE ARE ABLE TO MANUFACTURE ANY QUANTITY, HOWEVER PRICES WILL VARY SUBJECT TO OPTIMUM USE OF MACHINES AND MATERIALS.
To achieve the optimum hardness, preheat the material slowly, preferably in a salt bath or a controlled atmosphere furnace to 300 / 500 C. Soak thoroughly for approximately 30 minutes. Continue to heat to 780 / 820 C. Soak for a minimum of 15 minutes.
(Please Note: All temperatures and soaking times require adjusting according to the size and complexity of the section.)
Quench in Oil until cool to touch.
To obtain the following hardness results, hold at appropriate temperature for 1 hour per inch of thickness.
|Temperature||150 C||200 C||250 C||300 C|
All the above figures including the graph are intended as guidelines only, as times and temperatures are dependent on the technique and equipment used.